Method of performing protected angioplasty and stenting at a carotid bifurcation
a carotid artery and stenting technology, applied in the field of catheter based treatments for vascular diseases, can solve the problems of the most dangerous post-tenting angioplasty step in terms of embolic risk from detachment of cholesterol particles in the cerebral circulation, and achieve the effect of effectively eliminating the spasm of the distal carotid artery, reducing the volume of purging, and increasing the efficacy of aspiration
Active Publication Date: 2006-04-06
THERON LAURENCE
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Benefits of technology
[0007] In the new method, the embolic protection device is deployed only after initial stent placement, with the occlusion balloon inflated within the lumen of the deployed stent, rather than downstream or distally from the stent. This technique has significant advantages over prior methods in that (a) inflation of the occlusion balloon inside the stent provides a full and reliable occlusion of the carotid artery; (b) inflation within the stent provides a more positive fixation of the balloon without migration of the balloon or movement of the balloon during catheter exchanges; (c) the volume to purge is significantly less than wi
Problems solved by technology
Among the three standard technical steps in the technique of carotid angioplasty and stenting, (A) prestenting angioplasty, (B) deployment of the stent, and (C) poststenting a
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[0023]FIG. 1 illustrates a patient's carotid arteries with an atherosclerotic plaque 50 at the carotid bifurcation. The carotid bifurcation is a unique anatomical spot of the human body because of the carotid sinus. This dilatation at the origin of the internal carotid artery and the external carotid artery creates an area of turbulent flow that represents a kind of filter for the cerebral vasculature: the particles of cholesterol that circulate in the artery deposit on the arterial wall, mainly the posterior wall. There is usually no deposit of cholesterol above the site of the bifurcation. One of the goals of the present invention is to concentrate the whole procedure on the actual pathological area, which is limited in length and volume.
[0024] The procedure begins by establishing arterial access, typically with a needle puncture of the femoral artery or radial artery. A 7 or 8 French introducer sheath is positioned in the artery at the puncture site using a standard Seldinger te...
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A method is described for performing protected angioplasty and stenting of a patient's carotid bifurcation. A self-expanding stent is deployed across a stenosis in the patient's carotid artery. A catheter system that includes a rapid exchange balloon angioplasty catheter with an occlusion balloon catheter positioned through the guidewire lumen is advanced through the guiding catheter and into the distal end of the stent. The occlusion balloon is inflated within the lumen of the stent to occlude the carotid artery and to prevent any embolic debris from traveling downstream from the treatment site. The angioplasty balloon is inflated to dilate the stenosis and to complete the expansion of the self-expanding stent. The angioplasty catheter is withdrawn and any potential embolic debris is aspirated out through the lumen of the guiding catheter. The occlusion balloon is deflated and the catheter system is withdrawn.
Description
FIELD OF THE INVENTION [0001] The present invention relates generally to catheter based treatments for vascular disease. More particularly, it relates to an improved method of performing angioplasty and stenting utilizing embolic protection to capture any potential embolic debris. The method is particularly applicable for treatment of vascular disease at a carotid bifurcation. BACKGROUND OF THE INVENTION [0002] Catheter based treatments, including angioplasty and stenting, represent a tremendous advancement in the treatment of obstructive vascular disease. Percutaneous transluminal angioplasty (PTA) of stenotic lesions in peripheral arteries using a balloon dilatation catheter was first reported by Gruentzig et al in 1974 (Percutaneous recanalization after chronic arterial occlusion with a new dilator-catheter modification of the Dotter technique; Dtsch Med Wochenschr Dec. 6, 1974;99(49):2502-10, 2511). The first cases of percutaneous transluminal angioplasty of coronary arteries (P...
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Login to view more IPC IPC(8): A61F2/06A61F2/86
CPCA61B17/12136A61B2017/22067A61F2/86A61M25/104
Inventor THERON, LAURENCE
Owner THERON LAURENCE
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